SophiaPretty

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Category > Computer Science Posted 28 Nov 2017 My Price 8.00

Diffie–Hellman key exchange technique with a common prime

10.1 Users A and B use the Diffie–Hellman key exchange technique with a common prime q=71  and a primitive root α=7. 

1.    If user A has private key X A =5,  what is A’s public key Y A ? 

2.    If user B has private key X B =12,  what is B’s public key Y B ? 

3.    What is the shared secret key?

 

10.6 Consider an Elgamal scheme with a common prime q=71  and a primitive root α=7. 

1.    If B has public key Y B =3  and A choose the random integer k=2,  what is the ciphertext of M=30?

 

11.9 State the value of the padding field in SHA-512 if the length of the message is

1.    1919 bits

 

11.10 State the value of the length field in SHA-512 if the length of the message is

  1. 1920 bits
 

Answers

SophiaPretty
(5)
Status NEW Posted 28 Nov 2017 09:11 AM My Price 8.00

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